BEI15 Series www.murata-ps.com Isolated Wide Input Bipolar 15-Watt DC/DC Converters Typical unit FEATURES PRODUCT OVERVIEW Small footprint DC/DC converter, ideal for Featuring a full 15 Watt output in one square 2250 Volts DC (Q48 models) and 2000 VDC (Q12 high current applications inch of board area, the BEI-15 series isolated DC/ models). For powering digital systems, the outputs DC converter family offers effi cient regulated DC offer fast settling to step transients and will accept Industry standard 0.96" x 1.1" X 0.33" power for printed circuit board mounting. The higher capacitive loads. Excellent ripple and noise open frame package and pinout wide range 4:1 inputs on the 0.96" x 1.1" x 0.33" specifi cations assure compatibility to noise-sus- Wide range input voltages 9-36 and (24.4 x 27.9 x 8.4 mm) converter are either 9 to 36 ceptible circuits. For systems requiring controlled 18-75 Vdc Volts DC (Q12 models) or 18 to 75 Volts DC (Q48 startup/shutdown, an external remote On/Off Bipolar ±5V, ±12V and ±15V outputs models), ideal for battery-powered and telecom control may use a switch, transistor or digital logic. equipment. The industry-standard pinout fi ts larger A wealth of self-protection features avoid both Up to 15 Watts or greater total output 1" x 2" converters. Fixed output voltages of ±5, converter and external circuit faults. These include power with overtemperature shutdown ±12 or ±15 VDC are regulated to within ±0.25%. input undervoltage lockout and overtemperature Isolation up to 2250 VDC (basic), Q48 models Applications include small instruments, area- shutdown. The outputs current limit using the limited microcontrollers, data communications “hiccup” autorestart technique and the outputs High effi ciency synchronous rectifi er equipment, remote sensor systems, vehicle and are short-circuit protected. Additional features forward topology portable electronics. include output overvoltage and reverse conduction Usable -40 to 85°C temperature range The BEI-15 series includes full magnetic elimination. The high effi ciency offers minimal heat (with derating) and optical isolation with Basic protection up to buildup and “no fan” operation. Assembly and attachment for RoHS standards Extensive self-protection shut down features Meets UL 60950-1, CAN/CSA- C22.2 No. 60950-1, IEC60950-1, EN60950-1 safety approvals (2nd Edition) CONNECTION DIAGRAM F1 +Vin (1) (cid:42)(cid:84)(cid:80)(cid:77)(cid:66)(cid:85)(cid:74)(cid:80)(cid:79) Barrier +Vout (6) (cid:116)(cid:1)(cid:52)(cid:88)(cid:74)(cid:85)(cid:68)(cid:73)(cid:74)(cid:79)(cid:72) (cid:116)(cid:1)(cid:39)(cid:74)(cid:77)(cid:85)(cid:70)(cid:83)(cid:84) External DC On/Off Controller Common (5) Power Control and Source (3) Power (cid:116)(cid:1)(cid:52)(cid:88)(cid:74)(cid:85)(cid:68)(cid:73)(cid:74)(cid:79)(cid:72) (cid:53)(cid:83)(cid:66)(cid:79)(cid:84)(cid:71)(cid:70)(cid:83) (cid:116)(cid:1)(cid:39)(cid:74)(cid:77)(cid:85)(cid:70)(cid:83)(cid:84) -Vout (4) Open = On (cid:36)(cid:77)(cid:80)(cid:84)(cid:70)(cid:69)(cid:1)(cid:30)(cid:1)(cid:48)(cid:71)(cid:71) Reference and (cid:9)(cid:49)(cid:80)(cid:84)(cid:74)(cid:85)(cid:74)(cid:87)(cid:70)(cid:1) Error Amplifier (cid:77)(cid:80)(cid:72)(cid:74)(cid:68)(cid:10) -Vin (2) Typical topology is shown. For full details go to Murata Power Solutions recommends a fuse at F1. www.murata-ps.com/rohs REG.-Nr . D806 www.murata-ps.com/support MDC_BEI15W.A18 Page 1 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀ Output Input Open Frame R/N (mVp-p) Regulation (Max.) IIN = IIN = Effi ciency Package – C69 IOUT Total VIN no full VOUT (mA, Power Nom. Range load load Case Root Models ➀ (V) max.)➁ (W) Typ. Max. Line Load➄ (V) (V) (mA) (mA) Min. Typ. (inches) (mm) Pinout BEI15-050-Q12 ±5 ±1500 15 60 100 ±0.25% ±0.25% 24 9-36 90 740 82.8% 84% BEI15-050-Q48 ±5 ±1500 15 60 100 ±0.25% ±0.25% 48 18-75 50 374 82% 83.5% BEI15-120-Q12 ±12 ±625 15 80 120 ±0.25% ±0.25% 24 9-36 95 730 82% 86% 0.96x1.1x0.33 24.4x27.9x8.4 P74 BEI15-120-Q48 ±12 ±625 15 80 120 ±0.25% ±0.25% 48 18-75 50 370 84% 85.5% BEI15-150-Q12 ±15 ±500 15 100 150 ±0.25% ±0.25% 24 9-36 100 740 83% 84% BEI15-150-Q48 ±15 ±500 15 100 150 ±0.25% ±0.25% 48 18-75 50 360 84.5% 86% ➀ Please refer to the part number structure for additional options and complete Output capacitors are 1 μF ceramic in parallel with 10 μF electrolytic. The input cap ordering part numbers. is 100 μF, low ESR. ➁ The minimum output load for the BEI-15W series is 10% of maximum current to I/O caps are necessary for our test equipment and may not be needed for your meet published specifications. The converter will not be damaged by less than application. 10% load but some specs may degrade slightly. ➃ RoHS-6 compliance does not claim EU RoHS exemption 7b (lead in solder). ➂ All specifications are at nominal line voltage and full load, +25 °C. unless other- ➄ Balanced loads, 10% to 100% loads. wise noted. See detailed specifications and notes for full conditions. PART NUMBER STRUCTURE BEI15 - 050- Q12 P H Lx - C RoHS-6 Hazardous Substance Compliance (note 4) Bipolar Wide Input 15-Watt Series Pin Length Option Nominal Output Voltage Blank = Std. pin length 0.25˝ (6.3mm) in Tenths of a Volt L1 = 0.110˝ (2.79mm)* L2 = 0.145˝ (3.68mm)* *Minimum order quantity is required. Input Voltage Range Samples available with standard pin Conformal Coating Option Q12 = 9-36V length only. Blank = No coating, standard Q48 = 18-75V H = Coating added, optional (built to order; contact Murata Power Solutions for MOQ and lead times.)* On/Off Control Logic P = Positive N = Negative X = Control pin omitted‡ ‡Some model number combinations may not be available. See website or contact your local Murata sales representative. Special Customer Confi guration Part Number: BEI15-150-Q48N-C-CIS www.murata-ps.com/support MDC_BEI15W.A18 Page 2 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters FUNCTIONAL SPECIFICATIONS INPUT CHARACTERISTICS BEI15-050-Q12 BEI15-050-Q48 BEI15-120-Q12 BEI15-120-Q48 BEI15-150-Q12 BEI15-150-Q48 Input voltage range See ordering guide Start-up threshold, Volts typ. 9.0 17.0 9.5 17.0 8.9 17.0 Undervoltage shutdown, Volts 8.5 16.0 8.4 16.2 8.4 16.0 Overvoltage shutdown, Volts none Refl ected (back) ripple current mA pk-pk 5 30 30 30 5 30 Input current Full load conditions See ordering guide Inrush transient, A2sec 0.05 0.05 0.05 0.05 0.05 0.05 Output short circuit, mA 50 50 50 50 50 50 Output at min. load, mA 90 50 95 50 30 50 Low line (Vin=min.), Amps 2.03 1.0 2.01 0.97 1.97 0.96 Standby mode, mA (Off, UV, OT shutdown) 25 1 1 1 1 1 Recommended fuse, Amps 4 2 4 2 4 2 Internal input fi lter type Capacitive Reverse polarity protection None, install external fuse Remote On/Off Control Positive logic ("P" model suffi x) OFF=Gnd pin or -0.7 to +0.8V max. ON=open pin or +10 to +15V max. Negative logic ("N" model suffi x) OFF=open pin or +10 to +15V max. ON=Gnd pin or -0.7 to +0.8V max. On/Off Current, mA max. 1 OUTPUT CHARACTERISTICS BEI15-050-Q12 BEI15-050-Q48 BEI15-120-Q12 BEI15-120-Q48 BEI15-150-Q12 BEI15-150-Q48 Voltage output range See ordering guide Voltage output accuracy, % of Vnom. (50% load) ±1 Temperature coeffi cient, % of Vout range/°C ±0.02 Minimum loading, percent of full power 10 Ripple/noise (20 MHz bandwidth) Line/Load regulation See ordering guide Effi ciency Capacitive loading, μF max., 500 500 150 150 100 100 low ESR <0.02Ω max., resistive load Overvoltage protection, Volts 6.5 7 15.8 16 18 20 (hiccup auto restart after fault removal) OV protection method Magnetic feedback Isolation voltage Input to Output, Volts DC min. 2000 2250 2000 2250 2000 2250 Isolation resistance, MΩ min. 10 10 10 10 10 10 Isolation capacitance, pF 1000 1000 600 700 1000 1000 Isolation safety rating Basic insulation Miscellaneous Current limit inception, Amps (Vout 2.6 2.5 1 1.1 0.9 0.9 actual ≤ 98% of Vnom.) after warmup Short circuit protection method Current limiting, hiccup autorestart Short circuit current, Amps max. 0.3 Short circuit duration (output shorted to ground)➀ Continuous www.murata-ps.com/support MDC_BEI15W.A18 Page 3 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters DYNAMIC CHARACTERISTICS BEI15-050-Q12 BEI15-050-Q48 BEI15-120-Q12 BEI15-120-Q48 BEI15-150-Q12 BEI15-150-Q48 Start-up time, mS, max. 50 50 50 50 50 50 Vin to Vout regulated, mS, max. 50 50 50 60 50 50 (Remote On/Off to Vout regulated) Dynamic Load Response (50-75-50% load step) Settling time 250μSec 250μSec 250μSec 250μSec 250μSec 250μSec Peak deviation ±100mV ±100mV ±150mV ±150mV ±200mV ±200mV Switching frequency, KHz 350 305 300 320 330 320 Calculated MTBF, hours >2000000 Operating temperature range (Ambient, natural convection, with derating, -40 to +85°C vertical mount). See Derating graphs. No derating -40 to +70°C Storage temperature range -55 to +125°C Thermal protection/shutdown, °C 130 (measured at PWM) Relative humidity, non-condensing To +85°C/85% PHYSICAL CHARACTERISTICS Outline dimensions See mechanical specs Pin material Copper alloy Pin diameter 0.040 inches 1.016 mm Pin Finish Gold plate over nickel underplate Weight, ounces (grams) 0.352 (10) 0.352 (10) 0.352 (10) 0.352 (10) 0.32 (9.07) 0.32 (9.07) Electromagnetic interference Meets EN55022 and CISPR22 with external fi lter (requires external fi lter) Flammability rating UL 94V-0 UL/cUL 60950-1 Safety (designed to meet) CSA-C22.2 No.60950-1 IEC/EN 60950-1 ABSOLUTE MAXIMUM RATINGS Input Voltage Q12 models Volts, max.,continuous 36 Volts, transient 100 mS 50 Q48 models Volts, max.,continuous 75 Volts, transient 100 mS 100 On/Off Control, referred to -Vin Volts, min. -0.3 Volts, max. 15 Input reverse polarity protection None, install external fuse Output Current, sustained short circuit Current-limited, see specs Storage Temperature Range min. °C. -55 max. °C. +125 Lead Temperature, °C. max.(soldering, ten seconds) See soldering guidelines www.murata-ps.com/support MDC_BEI15W.A18 Page 4 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters PERFORMANCE DATA, BEI15-050-Q12 Effi ciency vs. Line Voltage and Load Current @ +25°C Power Dissipation vs. Line Voltage and Load Current @ +25°C 85 3.0 83 81 Watts) 2.5 Efficiency (%) 777579 VVVVIIIINNNN ==== 123 9246VVVV Power Dissipation ( 112...050 VVVVIIIINNNN ==== 123 9246VVVV 0.5 73 0.3 0.4 0.5 0.7 0.8 0.9 1.0 1.1 1.3 1.4 1.5 Output Load Current (Amps) 71 0.3 0.4 0.5 0.7 0.8 0.9 1.0 1.1 1.3 1.4 1.5 Load Current (Amps) Maximum Current Temperature Derating at Sea Level (VIN= 9V to 36V, airfl ow is from pin 1 to pin 3) 3 mps) 2 A Output Current ( 1 0.33 m/s (65 LFM) 0 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) www.murata-ps.com/support MDC_BEI15W.A18 Page 5 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters PERFORMANCE DATA, BEI15-050-Q48 Effi ciency vs. Line Voltage and Load Current @ +25°C Power Dissipation vs. Load Current @ +25°C 84 4.0 80 3.5 76 Efficiency (%) 556667260482 VVVVIIIINNNN ==== 12478485 VVVV Power Dissipation (Watts) 1223....5050 VIN = 18V 48 1.0 VIN = 24V VIN = 48V 44 VIN = 75V 0.5 40 0.2 0.3 0.4 0.6 0.7 0.8 1.0 1.1 1.2 1.4 1.5 0.2 0.3 0.4 0.6 0.7 0.8 1.0 1.1 1.2 1.4 1.5 Output Load Current (Amps) Load Current (Amps) Maximum Current Temperature Derating at Sea Level Maximum Current Temperature Derating at Sea level (VIN= 18 to 75V, airfl ow is from pin 1 to pin 2) (Vin = 18 to 75V, natural convection) 3 2 Output Current (Amps) 12 0.33 m/s (65 LFM) Output Load Current (Amps) 1 VVVVVViiiiiinnnnnn ====== 123467846805VVVVVV 0 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (°C) 0 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) www.murata-ps.com/support MDC_BEI15W.A18 Page 6 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters PERFORMANCE DATA, BEI15-120-Q12 Effi ciency vs. Line Voltage and Load Current @ +25°C Power Dissipation vs. Load Current @ +25°C 85 3.0 83 81 Watts) 2.5 %) n ( Efficiency ( 7779 VVVV IIIINNNN ==== 123 9246VVVV wer Dissipatio 12..50 VIN = 9V 75 Po VIN = 12V 1.0 VIN = 24V VIN = 36V 73 0.5 71 0.1 0.2 0.2 0.3 0.3 0.4 0.4 0.5 0.5 0.6 0.6 0.13 0.18 0.23 0.28 0.33 0.38 0.43 0.48 0.53 0.58 0.63 Output Load Current (Amps) Load Current (Amps) Maximum Current Temperature Derating at Sea Level (VIN= 9V to 36V, airfl ow is from pin 1 to pin 3) 0.8 0.75 0.7 mps) 0.65 A Output Current ( 00.5.56 0.33 m/s (65 LFM) 0.5 0.45 0.4 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) www.murata-ps.com/support MDC_BEI15W.A18 Page 7 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters PERFORMANCE DATA, BEI15-120-Q48 Effi ciency vs. Line Voltage and Load Current @ +25°C (Vout = 12V) Power Dissipation vs. Load Current @ +25°C 86 3.0 83 80 Watts) 2.5 n ( %) 77 VVVIIINNN === 124848VVV Dissipatio 2.0 ciency ( 74 VIN = 75V Power 1.5 VIN = 18V Effi 71 1.0 VIN = 24V VIN = 48V 68 VIN = 75V 0.5 0.1 0.1 0.2 0.2 0.3 0.3 0.4 0.5 0.5 0.6 0.6 65 0.06 0.12 0.17 0.23 0.29 0.34 0.40 0.45 0.51 0.57 0.62 Output Load Current (Amps) Load Current (Amps) Maximum Current Temperature Derating at Sea Level Maximum Current Temperature Derating at Sea Level (VIN= 18V, airfl ow is from pin 1 to pin 2) (VIN=24V, airfl ow is from pin 1 to pin 2) 0.65 0.65 0.5 m/s (100 LFM) Natural Convection mps) 0.60 mps) 0.60 A A Current ( Current ( Output 0.55 Output 0.55 0.50 0.50 20 25 30 35 40 45 50 55 60 65 70 75 80 85 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) Ambient Temperature (ºC) Maximum Current Temperature Derating at Sea Level Maximum Current Temperature Derating at Sea Level (VIN= 48V, airfl ow is from pin 1 to pin 2) (VIN= 75V, airfl ow is from pin 1 to pin 2) 0.65 0.65 Natural Convection 0.5 m/s (100 LFM) mps) 0.60 mps) 0.60 A A Current ( Current ( Output 0.55 Output 0.55 0.50 0.50 20 25 30 35 40 45 50 55 60 65 70 75 80 85 20 25 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) Ambient Temperature (ºC) www.murata-ps.com/support MDC_BEI15W.A18 Page 8 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters PERFORMANCE DATA, BEI15-150-Q12 Effi ciency vs. Line Voltage and Load Current @ +25°C Power Dissipation vs. Load Current @ +25°C 3.00 86 2.75 84 82 2.50 80 atts)2.25 %) 78 VIN = 9V n (W2.00 Efficiency ( 777246 VVVIIINNN === 123246VVV er Dissipatio11..5705 VVIINN == 1 92VV 70 Pow1.25 VIN = 24V VIN = 36V 68 1.00 66 0.75 64 0.50 0.10 0.14 0.18 0.22 0.26 0.30 0.34 0.38 0.42 0.46 0.50 0.10 0.14 0.18 0.22 0.26 0.30 0.34 0.38 0.42 0.46 0.50 Load Current (Amps) Output Load Current (Amps) Maximum Current Temperature Derating at Sea Level Maximum Current Temperature Derating at Sea Level (VIN= 9V to 36V, airfl ow is from pin 1 to pin 3) (Natural convection) 510 0.7 500 0.6 490 480 Output Current (Amps) 000...345 0.33 m/s (65 LFM) Output Current (mA) 444445670000 VViinn == 1224 VV 0.2 430 420 0.1 410 0 400 35 45 55 65 75 85 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) Ambient Temperature (ºC) www.murata-ps.com/support MDC_BEI15W.A18 Page 9 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters PERFORMANCE DATA, BEI15-150-Q48 Effi ciency vs. Line Voltage and Load Current @ +25°C Power Dissipation vs. Line Voltage and Load Current @ +25°C 88 3.25 86 3.00 2.75 84 82 Watts)22..2550 Efficiency (%) 77784680 VVVVIIIINNNN ==== 12478485VVVV Power Dissipation (1112....25705050 VIN = 18V 72 1.00 VIN = 24V VIN = 48V 70 0.75 VIN = 75V 0.50 68 0.1 0.1 0.2 0.2 0.3 0.3 0.3 0.4 0.4 0.5 0.5 0.10 0.14 0.18 0.22 0.26 0.30 0.34 0.38 0.42 0.46 0.50 Output Load Current (Amps) Load Current (Amps) Maximum Current Temperature Derating at Sea Level (VIN= 18 to 75V, airfl ow is from pin 1 to pin 2) 1 0.8 mps) 0.6 A Current ( 0.33 m/s (65 LFM) Output 0.4 0.2 0 30 35 40 45 50 55 60 65 70 75 80 85 Ambient Temperature (ºC) www.murata-ps.com/support MDC_BEI15W.A18 Page 10 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters MECHANICAL SPECIFICATIONS, OPEN FRAME TOP VIEW Case 69 Dimensions are in inches (mm shown for ref. only). Third Angle Projection Zero corner cuts for 24.4 20.1 0.96 0.79 BEI15-120-Q12 and BEI15-150-Q12 models. Tolerances (unless otherwise specified): PIN #1 .XX ± 0.02 (0.5) .XXX ± 0.010 (0.25) Angles ± 1˚ 27.9 Components are shown for reference only. 1.10 INPUT/OUTPUT CONNECTIONS Pin Function 1 Positive Vin 2 Negative Vin SIDE VIEW 3 On/Off Control * 4 Negative Vout 8.4 5 Common Return 0.33 MAX 6 Positive Vout SEATING PLANE *The Remote On/Off can be provided with either positive (P suffi x) or nega- tive (N suffi x) logic. 0.040 0.002 PIN WITH Some competitive units may use different pin 0.071 0.002 SHOULDER numbers; however, the BEI is plug compatible. 6X AT PINS 1-6 Follow the pin FUNCTION when laying out your PC board. BOTTOM VIEW (PIN SIDE) END VIEW 20.32 0.800 0.475 LC REF 2.54 0.100 10.16 #6 0.400 5.08 CL 0.200 #1 10.16 #5 0.400 #2 10.16 #4 #3 0.400 6.3 CL 0.25 Standard pin length is shown. Please refer to the Ordering Guide for alternate pin lengths. www.murata-ps.com/support MDC_BEI15W.A18 Page 11 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters SHIPPING TRAYS AND BOXES, THROUGH-HOLE MOUNT Anti-static foam Label Label Each tray is 6 x 5 units (30 units per tray) SHIPPING TRAY DIMENSIONS BEI modules are supplied in a 30-piece (6 x 5) shipping tray. The tray is an anti-static closed-cell polyethylene foam. Dimensions are shown below. [9.92] 252.0 6.4 Typ 6.4 28.4 Typ Typ 18.0 5x 38.1 25.4 252.0 Typ 252.0 [9.92] 190.5 Ref Ref 252.0 Ref R6.4 A A Typ 4x 44.5 9.5 deep 19.1 Ref 177.8 Ref 22.9 Ref 9.5 [.38 in] Pocket 19.1 [.75 in] Depth SECTION A-A Notes: 1. Material: Dow 220 antistat ethafoam (Density: 34-35 kg/m3) 2. Dimensions: 252 x 252 x 19.1 mm 6 x 5 array (30 per tray) 3. All dimensions in millimeters [inches] 4. Tolerances unless otherwise specified: +1/-0 www.murata-ps.com/support MDC_BEI15W.A18 Page 12 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters suggested capacitor values are 10 to 22 μF, rated at twice the expected maxi- TECHNICAL NOTES mum input voltage. Make sure that the input terminals do not go below the Input Fusing undervoltage shutdown voltage at all times. More input bulk capacitance may Certain applications and/or safety agencies may require fuses at the inputs of be added in parallel (either electrolytic or tantalum) if needed. power conversion components. Fuses should also be used when there is the possibility of sustained input voltage reversal which is not current-limited. For Recommended Output Filtering greatest safety, we recommend a fast blow fuse installed in the ungrounded The converter will achieve its rated output ripple and noise with no additional input supply line. external capacitor. However, the user may install more external output capaci- tance to reduce the ripple even further or for improved dynamic response. The installer must observe all relevant safety standards and regulations. For Again, use low-ESR ceramic (Murata GRM32 series) or polymer capacitors. safety agency approvals, install the converter in compliance with the end-user Initial values of 10 to 47 μF may be tried, either single or multiple capacitors in safety standard. parallel. Mount these close to the converter. Measure the output ripple under Input Under-Voltage Shutdown and Start-Up Threshold your load conditions. Under normal start-up conditions, converters will not begin to regulate properly Use only as much capacitance as required to achieve your ripple and noise until the rising input voltage exceeds and remains at the Start-Up Threshold objectives. Excessive capacitance can make step load recovery sluggish or Voltage (see Specifi cations). Once operating, converters will not turn off until possibly introduce instability. Do not exceed the maximum rated output capaci- the input voltage drops below the Under-Voltage Shutdown Limit. Subsequent tance listed in the specifi cations. restart will not occur until the input voltage rises again above the Start-Up Threshold. This built-in hysteresis prevents any unstable on/off operation at a Input Ripple Current and Output Noise single input voltage. All models in this converter series are tested and specifi ed for input refl ected ripple current and output noise using designated external input/output com- Users should be aware however of input sources near the Under-Voltage ponents, circuits and layout as shown in the fi gures below. The Cbus and Lbus Shutdown whose voltage decays as input current is consumed (such as poorly components simulate a typical DC voltage bus. Please note that the values of regulated capacitor inputs), the converter shuts off and then restarts as the Cin, Lbus and Cbus may vary according to the specifi c converter model. external capacitor recharges. Such situations could oscillate. To prevent this, make sure the operating input voltage is well above the UV Shutdown voltage TO AT ALL TIMES. OSCILLOSCOPE CURRENT PROBE Start-Up Delay +INPUT Assuming that the output current is set at the rated maximum, the Vin to Vout + LBUS Start-Up Delay (see Specifi cations) is the time interval between the point when the rising input voltage crosses the Start-Up Threshold and the fully loaded VIN +– CBUS CIN regulated output voltage enters and remains within its specifi ed regulation – band. Actual measured times will vary with input source impedance, external -INPUT input capacitance, input voltage slew rate and fi nal value of the input voltage as it appears at the converter. CIN = 2 x 100μF, ESR < 700mΩ @ 100kHz These converters include a soft start circuit to moderate the duty cycle of the CBUS = 1000μF, ESR < 100mΩ @ 100kHz PWM controller at power up, thereby limiting the input inrush current. LBUS = 1μH Figure 2: Measuring Input Ripple Current The On/Off Remote Control interval from inception to Vout regulated assumes that the converter already has its input voltage stabilized above the Start-Up Threshold before the On command. The interval is measured from the On command until the output enters and remains within its specifi ed accuracy +SENSE band. The specifi cation assumes that the output is fully loaded at maximum +OUTPUT rated current. Recommended Input Filtering C1 C2 SCOPE RLOAD The user must assure that the input source has low AC impedance to provide dynamic stability and that the input supply has little or no inductive content, -OUTPUT including long distributed wiring to a remote power supply. The converter will operate with no additional external capacitance if these conditions are met. For best performance, we recommend installing a low-ESR capacitor immediately adjacent to the converter’s input terminals. The capacitor should C1 = 1μF be a ceramic type such as the Murata GRM32 series or a polymer type. Initial C2 = 10μF LOAD 2-3 INCHES (51-76mm) FROM MODULE Figure 3: Measuring Output Ripple and Noise (PARD) www.murata-ps.com/support MDC_BEI15W.A18 Page 13 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters Minimum Output Loading Requirements Remote On/Off Control All models regulate within specifi cation and are stable under 10% minimum The remote On/Off Control can be specifi ed with either logic logic type. Please load to full load conditions. Operation under no load might however slightly refer to the Connection Diagram on page 1 for On/Off connections. increase output ripple and noise. Positive-logic models are enabled when the On/Off pin is left open or is Thermal Shutdown pulled high to +Vin with respect to –Vin. Therefore, the On/Off control can be To protect against thermal overstress, these converters include thermal shut- disconnected if the converter should always be on. Positive-logic devices are down circuitry. If environmental conditions cause the temperature of the DC/ disabled when the On/Off is grounded or brought to within a low voltage (see DC’s to rise above the Operating Temperature Range up to the shutdown tem- Specifi cations) with respect to –Vin. perature, an on-board electronic temperature sensor will power down the unit. Negative-logic devices are on (enabled) when the On/Off pin is grounded or When the temperature decreases below the turn-on threshold, the converter brought to within a low voltage (see Specifi cations) with respect to –Vin. The will automatically restart. There is a small amount of temperature hysteresis to device is off (disabled) when the On/Off is pulled high (see Specifi cations) with prevent rapid on/off cycling. respect to –Vin. CAUTION: If you operate too close to the thermal limits, the converter may Dynamic control of the On/Off function must sink the specifi ed signal current shut down suddenly without warning. Be sure to thoroughly test your applica- when brought low and withstand the specifi ed voltage when brought high. tion to avoid unplanned thermal shutdown. Be aware too that there is a fi nite time in milliseconds (see Specifi cations) between the time of On/Off Control activation and stable, regulated output. This Temperature Derating Curves time will vary slightly with output load type and current and input conditions. The graphs in this data sheet illustrate typical operation under a variety of conditions. The Derating curves show the maximum continuous ambient air Output Capacitive Load temperature and decreasing maximum output current which is acceptable These converters do not require external capacitance added to achieve rated under increasing forced airfl ow measured in Linear Feet per Minute (“LFM”). specifi cations. Users should only consider adding capacitance to reduce Note that these are AVERAGE measurements. The converter will accept brief switching noise and/or to handle spike current load steps. Install only enough increases in current or reduced airfl ow as long as the average is not exceeded. capacitance to achieve your noise and surge response objectives. Excess Note that the temperatures are of the ambient airfl ow, not the converter external capacitance may cause regulation problems and possible oscillation itself which is obviously running at higher temperature than the outside air. or instability. Also note that very low fl ow rates (below about 25 LFM) are similar to “natural The maximum rated output capacitance and ESR specifi cation is given for a convection”, that is, not using fan-forced airfl ow. capacitor installed immediately adjacent to the converter. Murata Power Solutions makes Characterization measurements in a closed Floating Outputs cycle wind tunnel with calibrated airfl ow. We use both thermocouples and an Since these are isolated DC/DC converters, their outputs are "fl oating." Any infrared camera system to observe thermal performance. BEI15 model may be confi gured to produce an output of 10V, 24V or 30V (for CAUTION: If you exceed these Derating guidelines, the converter may have ±5V, ±12V or ±15V models, respectively) by applying the load across the an unplanned Over Temperature shut down. Also, these graphs are all collected +Output and –Output pins, with either output grounded. The Common pin near Sea Level altitude. Be sure to reduce the derating for higher altitude. should be left open. Minimum 20% loading is recommended under these conditions. Output Current Limiting Soldering Guidelines Current limiting inception is defi ned as the point at which full power falls below the rated tolerance. See the Performance/Functional Specifi cations. Murata Power Solutions recommends the specifi cations below when installing these converters. These specifi cations vary depending on the solder type. Exceeding these Note particularly that the output current may briefl y rise above its rated value specifi cations may cause damage to the product. Your production environment may dif- in normal operation as long as the average output power is not exceeded. This fer; therefore please thoroughly review these guidelines with your process engineers. enhances reliability and continued operation of your application. If the output current is too high, the converter will enter the short circuit condition. Wave Solder Operations for through-hole mounted products (THMT) For Sn/Ag/Cu based solders: Output Short Circuit Condition Maximum Preheat Temperature 115° C. When a converter is in current-limit mode, the output voltage will drop as the output current demand increases. If the output voltage drops too low (approxi- Maximum Pot Temperature 270° C. mately 98% of nominal output voltage for most models), the PWM controller Maximum Solder Dwell Time 7 seconds will shut down. Following a time-out period, the PWM will restart, causing For Sn/Pb based solders: the output voltage to begin rising to its appropriate value. If the short-circuit Maximum Preheat Temperature 105° C. condition persists, another shutdown cycle will initiate. This rapid on/off cycling Maximum Pot Temperature 250° C. is called “hiccup mode”. The hiccup cycling reduces the average output cur- Maximum Solder Dwell Time 6 seconds rent, thereby preventing excessive internal temperatures and/or component damage. www.murata-ps.com/support MDC_BEI15W.A18 Page 14 of 15

BEI15 Series Isolated Wide Input Bipolar 15-Watt DC/DC Converters Emissions Performance [3] Conducted Emissions Test Results Murata Power Solutions measures its products for radio frequency emissions against the EN 55022 and CISPR 22 standards. Passive resistance loads are employed and the output is set to the maximum voltage. If you set up your own emissions testing, make sure the output load is rated at continuous power while doing the tests. The recommended external input and output capacitors (if required) are included. Please refer to the fundamental switching frequency. All of this information is listed in the Product Specifi cations. An external discrete fi lter is installed and the circuit diagram is shown below. Test Card Resistive Load V+ UUT Rinessidiseti vae m Leotaadl Vout+ C3 container Black C16 C8 C8 L3 C8 L1 C8 C8 C8 C7 Vin+ C17 Gnd C4 Resistive Load V- Vin- Vout- inscidone taa imneertal Graph 1. Conducted emissions performance with fi lter, CISPR 22, Class B, full load, for BEI15-150-Q12P-C Figure 4. Conducted Emissions Test Circuit [1] Conducted Emissions Parts List Reference Description L1 1mH, 6A L3 500μH,10A C1, C2, C8 2.2μfd C7 Electrolytic Capacitor 100μfd, 100V C16, C17 .22μfd C3, C4 Electrolytic Capacitor 33μfd, 100V [2] Conducted Emissions Test Equipment Used Rohde & Schwarz EMI Test Receiver (9KHz – 1000MHz) ESPC Rohde & Schwarz Software ESPC-1 Ver. 2.20 OHMITE 25W – 1 Ohm resistor combinations DC Source Programmable DC Power Supply Model 62012P-100-50 Graph 2. Conducted emissions performance without fi lter, CISPR 22, Class B, full load, for BEI15-150-Q12P-C This product is subject to the following operating requirements Murata Power Solutions, Inc. and the Life and Safety Critical Application Sales Policy: 11 Cabot Boulevard, Mansfi eld, MA 02048-1151 U.S.A. Refer to: http://www.murata-ps.com/requirements/ ISO 9001 and 14001 REGISTERED Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. © 2016 Murata Power Solutions, Inc. www.murata-ps.com/support MDC_BEI15W.A18 Page 15 of 15

Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M urata: BEI15-050-Q12N-C BEI15-050-Q12P-C BEI15-050-Q48N-C BEI15-050-Q48P-C BEI15-120-Q12N-C BEI15-120- Q12P-C BEI15-120-Q48N-C BEI15-120-Q48P-C BEI15-150-Q12N-C BEI15-150-Q12P-C BEI15-150-Q48N-C BEI15-150-Q48P-C